Specification: Color: Sliver Material: Stainless Steel Base Size: 23 * 63mm, 23 * 123mm Chain Length: 185mm Package Included: 1 x door safety chain 4x screws 1 x No nail glue Material: stainless steel. Product name: Door chain. The high quality stainless steel is hand-brushed to ensure rust-proofness and long service life. Product info: Stainless steel safety sliding bolt door chain guard choose 304 stainless steel material stamping form, have qualitative feeling surface smooth, corrosion resistance , prevent birth rust; The anti-theft chain door latches can be used for a variety of door types and can be placed above or next to the door panel. Usage: Door chain lock for revolving doors, opens access for a safe view. This chain latch allows you to partially open the door to identify visitors or receive parcels. Easy to Install: Chain Door Guard can be used on wooden or metal doors on a variety of door types. It can be placed above or next to the door panel. This latch is very easy to install and is solid. With four included mounting screws, no additional screws are required.